Side By Side Demo
Offers Kubernetes Deployments and Knative Serving services of:
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dotnetcore
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Go
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Nodejs
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Python
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Quarkus
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Spring Boot
Quickstart with Knative Serving
kubectl create namespace sidebyside kubens sidebyside
OR
oc new-project sidebyside
Node.js
cd hello/nodejs kubectl apply -f kubefiles/knService_docker.yml # the last I checked, Knative Serving worked best with docker hub due to registry API v2_2 ./knpoller_ocp4.sh # there other poller scripts depending on your Kubernetes variant Node Hello on noded-wj854-deployment-569f8cd6cd-vn9g9:1 Node Hello on noded-wj854-deployment-569f8cd6cd-vn9g9:2
Quarkus
cd hello/quarked kubectl apply -f kubefiles/knService_docker.yml ./knpoller_ocp4.sh Aloha quarked-qwt7d-deployment-6f4ccfffc5-g2xxg:1 Aloha quarked-qwt7d-deployment-6f4ccfffc5-g2xxg:2
Spring Boot
cd hello/booted kubectl apply -f kubefiles/knService_docker.yml ./knpoller_ocp4.sh Hola Boot booted-kskv5-deployment-68f8f944ff-h8lvs:1 Hola Boot booted-kskv5-deployment-68f8f944ff-h8lvs:2
Burst
The Knative Service yaml definition includes the following:
metadata:
annotations:
autoscaling.knative.dev/target: "10"
The out-of-the-box default is 100 which is hard to "overload" and cause more than 1 pod to spawn.
The knBurst scripts use a tool called siege to send in 40 concurrent requests, causing Knative to scale to 4 pods.
Terminal 1:
watch kubectl get pods
Terminal 2:
./knburst_ocp4.sh ** SIEGE 4.0.4 ** Preparing 40 concurrent users for battle. The server is now under siege..
Terminal 1:
NAME READY STATUS RESTARTS AGE noded-wj854-deployment-569f8cd6cd-9bwtl 1/2 Running 0 11s noded-wj854-deployment-569f8cd6cd-db7vl 1/2 Running 0 10s noded-wj854-deployment-569f8cd6cd-j4bsm 0/2 ContainerCreating 0 8s noded-wj854-deployment-569f8cd6cd-kxr2f 1/2 Running 0 10s
Dashboards
Prometheus
open https://$(oc -n openshift-monitoring get route prometheus-k8s -o jsonpath='{..spec.host}')Or else you can open the integrated prometheus dashboard within OpenShift:
Metrics
The PromQL is
container_memory_rss{namespace="sidebyside",container="user-container"}
You should then see a graph like this one:
Grafana
open https://$(oc -n openshift-monitoring get route grafana -o jsonpath='{..spec.host}')Select Kubernetes / Compute Resources / Namespace (Pods)
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent